Shackle assembly with locking pin

A combination of a shackle with a pin and a locking ring comprising:

• a shackle having a rigid shackle body with a closed geometry defining a primary opening therethrough, the rigid shackle body comprising:
• a first side member with a first side aperture extending transversely therethrough, the first side aperture defining a first opening recess having at least one recess wall and located between an inside body surface and an outside body surface of the first side member;
• a second side member spaced apart from the first side member and having a second side aperture extending transversely at least partially through the second side member, the second side aperture positioned opposite the first side aperture and axially aligned with the first side aperture;
• and
• end portions extending between and connecting the first side member and the second side member;
• a pin comprising pin body portion extending longitudinally between a head portion and a tip portion, the head portion defining an annular head slot with a slot diameter, wherein the pin body is sized to be received through the first side aperture with the tip portion received in the second side aperture;
• and
• a retaining ring expandable for installation on the pin and sized to be received in the annular head slot;
• wherein when the pin is installed in the rigid shackle body with the tip portion received in the second side aperture and the head received in the first side aperture, and the retaining ring is installed on the pin in the annular head slot, the retaining ring is positioned to engage the recess wall to prevent removal of the pin.